Properties of the Number -129899

One Hundred Twenty-Nine Thousand Eight Hundred Ninety-Nine

Basics

Value: -129900 → -129899 → -129898

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 38

Digital Root: 2

Palindrome: No

Factorization: 7 ² × 11 × 241

Divisors: 1, 7, 11, 49, 77, 241, 539, 1687, 2651, 11809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -11111101101101011

Octal: -375553

Duodecimal: -6320B

Hexadecimal: -1fb6b

Square: 16873750201

Square Root: 360.41503853196804

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers k such that σ(φ(σ(k))) = φ(σ(φ(k))). A67160

a(n) = 2·F(n-1) + 2·F(n-3) + 10·F(n-5) + 9·F(n-8) where n >= 8 and F = A000045. A280932

Composite solutions of the form 4k+3 of the equation (*): σ(φ(σ(x)))=φ(σ(φ(x))). A112017